Test # 23
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Precaution while using Contact Lenses
Gas permeable lenses
Gas permeable lenses can potentially scratch the cornea if the lens does not fit properly or if the lens is worn while sleeping. They are also more likely to slide off the cornea and become hidden under the lid. Gas permeable lenses traditionally had a reputation for popping out of the eye. Newer lens designs have minimized the chance of losing a contact even during vigorous exercise.